IDT72T6480 Integrated Device Technology, IDT72T6480 Datasheet - Page 34

• Manufacturer Part Number: IDT72T6480
• Description: X48 Sequential Flow-control Device Up To 1gigabit
• Manufacturer: Integrated Device Technology

IDT72T6480 2.5V, SEQUENTIAL FLOW-CONTROL DEVICE
x12, x24, x48 BIT WIDE CONFIGURATION
D[47:0]
Q[47:0]
WCLK
D[47:0]
Q[47:0]
RCLK
NOTES:
1. t
2. Settings: OE = LOW, RCS = LOW, WCS = LOW, BM[3:0] = 1000, FWFT = LOW, ASYR = HIGH, and ASYW = HIGH.
WCLK
NOTES:
1. t
2. Settings: OE = LOW, RCS = LOW, WCS = LOW, BM[3:0] = 1000, FWFT = HIGH, ASYR = HIGH, and ASYW = HIGH.
WEN
RCLK
REN
WEN
REN
Symbol
t
t
t
t
t
(plus t
(plus t
SENH
A
SENS
SKEW1
REFs
EF
SKEW1
SKEW1
OR
REFs
REFs
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH after one RCLK cycle
is the minimum time between a rising WCLK edge and a rising RCLK edge to guarantee that EF will go HIGH after one RCLK cycle
). If t
). If t
Serial Enable Setup
Serial Enable Hold
Data Access Time
Skew time between RCLK and WCLK for EF/OR
and FF/IR in SDR
Read Clock to Synchronous EF/OR
SKEW1
SKEW1
is not met, then EF de-assertion may be delayed one extra RCLK cycle.
is not met, then EF de-assertion may be delayed one extra RCLK cycle.
t
ENS
t
ENS
t
Word 0
t
ENS
ENS
Word 0
Parameter
Figure 8. Write First Word Cycles - IDT Standard Mode
t
t
SKEW1
t
ENH
t
SKEW1
ENH
Figure 9. Write First Word Cycles - FWFT Mode
1
1
Word 1
Word 1
t
REFs
2
2
Word 2
Word 2
(x24 or x12 I/O only) (x48 I/O width only)
34
Min.
—
5
5
1
4
t
t
t
ENS
ENH
ENH
7-5ns
t
REFs
Max.
t
t
3
A
—
—
—
A
4
4
t
Word 0
Min.
ENS
Word 0
—
5
5
1
5
7-5ns
t
t
A
A
Max.
—
—
—
5
5
Word 1
Word 1
Min.
COMMERCIAL AND INDUSTRIAL
—
t
t
5
5
1
7
ENH
t
REFs
t
ENH
t
REFs
t
A
A
10ns
TEMPERATURE RANGES
Max.
6.5
6.5
—
—
—
Word 2
Word 2
OCTOBER 10, 2005
6358 drw17
6358 drw16
Unit
ns
ns
ns
ns
ns